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v. G. APPLE METHOD OF BUILDING ARMATURES' July 2 1.929.

( Driginal Filed Oct. 11, 1920 3 sheets sheet INVENTOR July 2, 1929 v.G. APPLE METHOD OF BUILDING ARMATURES :5 Sheets-Sheet INVENTOR July 2,1929. v. G. APPLE I METHOD OF BUILDING ARMATURES Original Filed Oct. 11,1920 5 Sheets-Sheet 3 INVENTOR MZW aligned, ready R eissu ed July 2,1929.

uni-Tao STATES.

,IVINGEN'I' e. APPLE, or DAYTON, 01110.

Original No.,1,555,931; dated October 6, 1925, SeriafNo. 416,307, filedOctober 11', 1920. Application reissue filed July 12, 1927. Serial No.205,259.

This invention relatesto methods of building armatures and has especialreference to armatures ofthe bar wound type. The object of the inventionis to provide a new and 5 ,improved mode of procedure for applyingconductor bars on the cores of dynamo electric machine elements;

I attain this objectby the inethod illustrated in the accompanyingdrawing, where- 10 1n:' i Y v fFig. 1, shows, in perspective two of thewinding loops;

t Fig. 2, a core with two loops completely entered therein;

a Fig. 3, a core with loops slightly entered; I Fig. 4, the core withfirst and second loops aligned ready for the insertion'of the third;

Fig. 5, the core with all loops inserted and to press into place;

Fig. 6, the core after the loops have been endwise entered therein.

Similar numerals refer thru out the several views.

25. V The loops Figure 1 are such as are commonly employed in bar wounddynamo electric machine elements. Each comprises a bar 10, adapted tooccupy the outer half of the first and second .to similar parts awinding aperture, a bar 11, adapted to 00- 3o copy the inner half of-awinding aperture, a

I yoke portion 12, proceeding at an, angle from ar 10, and a yokeportion 13, proceeding at w an angle from bar 11, the two yoke portions7 v joining as at 14. When all the loops are in their final position inthe core 9, the yoke-portions 12 overlie the outer half of the windingapertures and the oke ortions 13 over 1 lie the inner half of t ewinding apertures,

(See 6)- v When one or more, but less than the total required number ofloops, arefully entered in the core apertures as shown in Figure 2,

it will be seen that the yoke portions 12 overs lie the outer half ofseveral winding aperhalf of several winding apertures, so that u thosebars which should eventually occupy the apertures so covered may not nowbe entered therein. Itfollows that, before proceeding 50 to endwiseenter a winding of the character shown into the apertures of the core,the entire number of the loops necessary to the com plete winding mustbe placed in substantially that relation to each other which is re uiredafter endwise entry has been made, an that METHOD OF BUILDINGARMA'IURES.

tures, and yoke portions 13 overlie the inner,

PATENT OFFICE.

REISSUED for rangement of the loops for endwise entry into the core,without assembling them first into a template or other holding means andafterward having to transfer them to the core. By reference to Figure '5it will appear that when a winding of the character herein employed isarranged in the necessary cylindrical formation required for endwiseentry, each and every loop has its yoke portions 12 and 18 undercorresponding yoke portions of adjacent loops. It follows that, in orderto enter or remove a loop from such a formation, relative radialmovement, between the yoke portions of the loop being entered or removedand those adjacent, must be effected. In a formation as appears in Fig.5 an entire 100 may not be radially displaced, since the en s of theloops are entered into the core apertures. It is therefore importantthat these ends must be slightly entered into the apertures, so that theyoke ends may he leaned toward or away from the core axis. In practice,a loop 15. is first entered as in Fig. 3, then followed by a loop 16,the yoke portion of the two loops being at variance as to radialposition. .The yokes of loops 15 and 16 are next brought together, byrelative radial movement of the yokes with'i each other, to a positionas shown in Fig. 4. Succeeding loops may then he inserted,'advancingclockwise or counterclockwise as desired. If, after the first loop isentered, the proced re is clockwise around the core, the inserted loopsare preferably leaned outwardly instead of inwardl and the loops beinginserted first leane inwardly and then outwardly.

After the last loop is thus inserted the yokes are all brought to theradial position .endwise enteringithem, it is the purpose of the presentapplication to cover specifically the method of arranging the loops insuitable formation Without a special means of retaining them in thisformation other than the core itself, then simultaneously endwise,entering them. This latter method is considered new and useful,therefore I claim 1. Steps in the method of making a dynamo electricmachine element which consists in providing a core having a plurality ofWinding apertures; providing a plurality of winding loops of thecharacter described; inserting the free ends of a loop intocorresponding apertures of the core to such a limited extent as willpermit limited radial movement of the yoke end of the loop; insertingthe remaining loops to substantially the same extent as the. first loop,always keeping the yoke ends ofloops being inserted radially at variancewith the yoke ends of adjacent inserted loops until the yoke portions ofloops being inserted may enter under the corresponding yoke portions ofsaid adjacent inserted loops; moving the yoke ends of the loops to theircorrect radial position; then simultaneously endwise entering the loopsinto the core.

2. Steps in the making of a dynamo electric machine element whichconsists in providing a core having a plurality of Winding apertures;providinga plurality of Winding loops of the character described;inserting the freeends of a loop into the corresponding apertures of thecore to such a limited extent as will permit limited radial movement ofthe yoke endv of the loop; leaning the yoke end of the loop so insertedaway from the core axis; inserting succeeding loops by lean,- ing theyoke ends first toward the core axis, until inserted to the properdepth, then leaning the yoke ends away from the core axis to bring theyoke end of a loop being inserted under a corresponding yoke end of theloop next previously inserted; straightening up .the loops to bring theyoke ends to their correct radial position; then simultaneously endwiseentering'the loops into the core.

In testimony whereof I "hereunto subscribe my name.

I VINCENT 6. APPLE.

